Finally changed my 12v AGM maybe 10 years old

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Shawty

Member
Joined
Nov 28, 2024
Messages
15
Location
Buckinghmashire, UK
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So I think this on my old battery is a date stamp which would suggest my Yuasa S46B24LS is the original given my 2015 reg date - not bad that the AGM lasted 10 years.

If you're in the UK, Arnold Clark doing an OEM replacement Yuasa battery for under £160 which is the cheapest I've seen

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I did fit the battery clamps after this photo almost forgot about them 🤣
 
My 2014 had the original 12V Aux Battery.
Until I changed it last year, still working, after reading here how vital it is to starting the car.
 
Swapped out my 2015 battery last week. But was coming out +200 euro to find a matching battery with the oversized vent.
With some research I found for €120 the yuasa HSB053 is identical except the vent. I was able to modify the original vent connector with a pair of toothed pliers. Pairing down the connector till it press fit tightly.
 
As I understand is the AGM has nothing to do with the chemistry of the battery, but dictates that it's suitable for auto start/stop engine applications. Maybe I'm wrong.

Regardless the yuasa HSB053 is listed in Halfords AGM battery lineup. Not that I trust them but I felt I could take it as sufficient.

Most important for batteries within the cabin is that they are properly vented. Which also the HSB053 comes with dual vent. Just be sure to add a plug to the unused vent.

Edit: your right! AGM is not then the star stop suitability of the battery. Seems I want to look at an alternative. Humm. Tried to update my post above, but can't. Regardless I'll not by tying myself down to the one battery on the market that has that oversized vent. Will swap for any AGM that fits the other specs. 😁
 
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As I've mentioned elsewhere there are other non-OEM alternatives that are a drop-in replacement, like the Optima yellow-top which I sourced via Tanya batteries some time back. Lower capacity at 38/35AH but works perfectly and the vent outlet is an exact match. Halfrauds I'd not go to unless totally desperate IMHO.

And yes, you want it to be AGM as it isn't about venting the gasses but reducing the risk of acid flying about in the cabin in an accident.
 
As I understand is the AGM has nothing to do with the chemistry of the battery, but dictates that it's suitable for auto start/stop engine applications. Maybe I'm wrong.

Regardless the yuasa HSB053 is listed in Halfords AGM battery lineup. Not that I trust them but I felt I could take it as sufficient.

Most important for batteries within the cabin is that they are properly vented. Which also the HSB053 comes with dual vent. Just be sure to add a plug to the unused vent.

Edit: your right! AGM is not then the star stop suitability of the battery. Seems I want to look at an alternative. Humm. Tried to update my post above, but can't. Regardless I'll not by tying myself down to the one battery on the market that has that oversized vent. Will swap for any AGM that fits the other specs. 😁
You should take your battery back to Halfords for being mis-sold as an AGM.

I would also say frustratingly AGM's are on the expensive side when compared to standard lead acid batteries, but if they're lasting 8-10 years it might be a worthwhile investment.
 
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